3v4l.org

run code in 300+ PHP versions simultaneously
<?php function dump($a, $b) { echo 'a: '; var_dump($a); echo 'b: '; var_dump($b); } call_user_func_array('dump', array( 'foo' => 'A', 'bar' => 'B' ));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Fatal error: Uncaught Error: Unknown named parameter $foo in /in/rfLQ8:8 Stack trace: #0 {main} thrown in /in/rfLQ8 on line 8
Process exited with code 255.
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
a: string(1) "A" b: string(1) "B"

preferences:
293.62 ms | 404 KiB | 449 Q